./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_two_index_08.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_two_index_08.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f36ecc230238464ca74f9ec244847d47641e99ef3ee219d6c3ec0ed13a7505ac --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 10:08:17,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 10:08:17,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 10:08:17,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 10:08:17,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 10:08:17,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 10:08:17,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 10:08:17,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 10:08:17,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 10:08:17,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 10:08:17,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 10:08:17,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 10:08:17,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 10:08:17,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 10:08:17,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 10:08:17,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 10:08:17,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 10:08:17,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 10:08:17,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 10:08:17,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 10:08:17,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 10:08:17,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 10:08:17,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 10:08:17,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 10:08:17,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 10:08:17,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 10:08:17,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 10:08:17,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 10:08:17,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 10:08:17,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 10:08:17,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 10:08:17,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 10:08:17,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 10:08:17,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 10:08:17,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 10:08:17,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 10:08:17,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 10:08:17,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 10:08:17,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 10:08:17,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 10:08:17,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 10:08:17,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 10:08:17,614 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 10:08:17,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 10:08:17,615 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 10:08:17,615 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 10:08:17,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 10:08:17,616 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 10:08:17,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 10:08:17,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 10:08:17,617 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 10:08:17,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 10:08:17,618 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 10:08:17,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 10:08:17,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 10:08:17,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 10:08:17,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 10:08:17,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 10:08:17,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 10:08:17,620 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 10:08:17,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 10:08:17,620 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 10:08:17,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 10:08:17,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 10:08:17,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 10:08:17,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 10:08:17,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 10:08:17,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 10:08:17,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 10:08:17,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 10:08:17,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 10:08:17,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 10:08:17,622 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 10:08:17,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 10:08:17,622 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 10:08:17,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 10:08:17,623 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 10:08:17,623 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36ecc230238464ca74f9ec244847d47641e99ef3ee219d6c3ec0ed13a7505ac [2023-02-18 10:08:17,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 10:08:17,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 10:08:17,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 10:08:17,881 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 10:08:17,884 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 10:08:17,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_08.i [2023-02-18 10:08:18,868 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 10:08:19,048 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 10:08:19,048 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_08.i [2023-02-18 10:08:19,052 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9952cb00/6574d6f33f4d4359b447ae8abee90501/FLAGfbf9cf0f3 [2023-02-18 10:08:19,477 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9952cb00/6574d6f33f4d4359b447ae8abee90501 [2023-02-18 10:08:19,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 10:08:19,480 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 10:08:19,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 10:08:19,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 10:08:19,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 10:08:19,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:08:19" (1/1) ... [2023-02-18 10:08:19,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@667e5c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:08:19, skipping insertion in model container [2023-02-18 10:08:19,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 10:08:19" (1/1) ... [2023-02-18 10:08:19,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 10:08:19,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 10:08:19,581 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_08.i[814,827] [2023-02-18 10:08:19,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 10:08:19,595 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 10:08:19,602 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_08.i[814,827] [2023-02-18 10:08:19,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 10:08:19,615 INFO L208 MainTranslator]: Completed translation [2023-02-18 10:08:19,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:08:19 WrapperNode [2023-02-18 10:08:19,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 10:08:19,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 10:08:19,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 10:08:19,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 10:08:19,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:08:19" (1/1) ... [2023-02-18 10:08:19,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:08:19" (1/1) ... [2023-02-18 10:08:19,637 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-02-18 10:08:19,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 10:08:19,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 10:08:19,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 10:08:19,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 10:08:19,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:08:19" (1/1) ... [2023-02-18 10:08:19,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:08:19" (1/1) ... [2023-02-18 10:08:19,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:08:19" (1/1) ... [2023-02-18 10:08:19,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:08:19" (1/1) ... [2023-02-18 10:08:19,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:08:19" (1/1) ... [2023-02-18 10:08:19,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:08:19" (1/1) ... [2023-02-18 10:08:19,653 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:08:19" (1/1) ... [2023-02-18 10:08:19,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:08:19" (1/1) ... [2023-02-18 10:08:19,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 10:08:19,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 10:08:19,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 10:08:19,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 10:08:19,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:08:19" (1/1) ... [2023-02-18 10:08:19,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 10:08:19,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:08:19,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 10:08:19,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 10:08:19,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 10:08:19,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 10:08:19,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 10:08:19,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 10:08:19,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 10:08:19,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 10:08:19,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 10:08:19,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 10:08:19,781 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 10:08:19,784 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 10:08:19,870 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 10:08:19,874 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 10:08:19,874 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 10:08:19,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:08:19 BoogieIcfgContainer [2023-02-18 10:08:19,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 10:08:19,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 10:08:19,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 10:08:19,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 10:08:19,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 10:08:19" (1/3) ... [2023-02-18 10:08:19,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a83e41b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:08:19, skipping insertion in model container [2023-02-18 10:08:19,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 10:08:19" (2/3) ... [2023-02-18 10:08:19,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a83e41b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 10:08:19, skipping insertion in model container [2023-02-18 10:08:19,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 10:08:19" (3/3) ... [2023-02-18 10:08:19,881 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_08.i [2023-02-18 10:08:19,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 10:08:19,892 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 10:08:19,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 10:08:19,926 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@35794947, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 10:08:19,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 10:08:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:19,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 10:08:19,933 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:08:19,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:08:19,933 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:08:19,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:08:19,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2023-02-18 10:08:19,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:08:19,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412804344] [2023-02-18 10:08:19,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:08:19,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:08:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:08:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 10:08:20,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:08:20,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412804344] [2023-02-18 10:08:20,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412804344] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:08:20,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 10:08:20,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 10:08:20,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431089870] [2023-02-18 10:08:20,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:08:20,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 10:08:20,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:08:20,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 10:08:20,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 10:08:20,167 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:20,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:08:20,207 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2023-02-18 10:08:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 10:08:20,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 10:08:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:08:20,213 INFO L225 Difference]: With dead ends: 28 [2023-02-18 10:08:20,214 INFO L226 Difference]: Without dead ends: 12 [2023-02-18 10:08:20,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 10:08:20,218 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:08:20,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:08:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-18 10:08:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-18 10:08:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:20,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-02-18 10:08:20,246 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2023-02-18 10:08:20,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:08:20,246 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-02-18 10:08:20,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-02-18 10:08:20,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 10:08:20,247 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:08:20,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:08:20,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 10:08:20,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:08:20,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:08:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2023-02-18 10:08:20,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:08:20,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790855837] [2023-02-18 10:08:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:08:20,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:08:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:08:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 10:08:20,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:08:20,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790855837] [2023-02-18 10:08:20,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790855837] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:08:20,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323035517] [2023-02-18 10:08:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:08:20,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:08:20,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:08:20,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:08:20,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 10:08:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:08:20,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-18 10:08:20,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:08:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 10:08:20,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 10:08:20,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323035517] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 10:08:20,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 10:08:20,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-02-18 10:08:20,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557701164] [2023-02-18 10:08:20,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 10:08:20,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 10:08:20,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:08:20,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 10:08:20,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 10:08:20,446 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:08:20,490 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-02-18 10:08:20,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 10:08:20,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 10:08:20,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:08:20,491 INFO L225 Difference]: With dead ends: 24 [2023-02-18 10:08:20,492 INFO L226 Difference]: Without dead ends: 18 [2023-02-18 10:08:20,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 10:08:20,493 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:08:20,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:08:20,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-18 10:08:20,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2023-02-18 10:08:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-02-18 10:08:20,505 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-02-18 10:08:20,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:08:20,505 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-02-18 10:08:20,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-02-18 10:08:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 10:08:20,505 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:08:20,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:08:20,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 10:08:20,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:08:20,707 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:08:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:08:20,708 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2023-02-18 10:08:20,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:08:20,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488265549] [2023-02-18 10:08:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:08:20,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:08:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:08:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 10:08:20,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:08:20,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488265549] [2023-02-18 10:08:20,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488265549] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:08:20,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332079746] [2023-02-18 10:08:20,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:08:20,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:08:20,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:08:20,764 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:08:20,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 10:08:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:08:20,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 10:08:20,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:08:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 10:08:20,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:08:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 10:08:20,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332079746] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:08:20,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:08:20,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-18 10:08:20,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958804471] [2023-02-18 10:08:20,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:08:20,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 10:08:20,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:08:20,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 10:08:20,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-18 10:08:20,840 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:20,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:08:20,886 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-02-18 10:08:20,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 10:08:20,886 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 10:08:20,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:08:20,888 INFO L225 Difference]: With dead ends: 36 [2023-02-18 10:08:20,888 INFO L226 Difference]: Without dead ends: 27 [2023-02-18 10:08:20,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-18 10:08:20,890 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:08:20,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:08:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-18 10:08:20,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2023-02-18 10:08:20,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:20,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-18 10:08:20,899 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2023-02-18 10:08:20,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:08:20,899 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-18 10:08:20,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-18 10:08:20,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 10:08:20,900 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:08:20,900 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:08:20,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 10:08:21,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-18 10:08:21,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:08:21,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:08:21,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 2 times [2023-02-18 10:08:21,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:08:21,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794316623] [2023-02-18 10:08:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:08:21,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:08:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:08:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 10:08:21,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:08:21,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794316623] [2023-02-18 10:08:21,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794316623] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:08:21,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125637547] [2023-02-18 10:08:21,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 10:08:21,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:08:21,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:08:21,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:08:21,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 10:08:21,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 10:08:21,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:08:21,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 10:08:21,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:08:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 10:08:21,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:08:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 10:08:21,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125637547] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:08:21,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:08:21,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-02-18 10:08:21,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630319314] [2023-02-18 10:08:21,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:08:21,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 10:08:21,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:08:21,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 10:08:21,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2023-02-18 10:08:21,375 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:21,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:08:21,439 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2023-02-18 10:08:21,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 10:08:21,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 10:08:21,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:08:21,441 INFO L225 Difference]: With dead ends: 57 [2023-02-18 10:08:21,441 INFO L226 Difference]: Without dead ends: 47 [2023-02-18 10:08:21,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2023-02-18 10:08:21,443 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 10:08:21,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 10:08:21,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-18 10:08:21,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2023-02-18 10:08:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-02-18 10:08:21,449 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2023-02-18 10:08:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:08:21,450 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-02-18 10:08:21,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:21,451 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-02-18 10:08:21,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 10:08:21,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:08:21,452 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:08:21,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 10:08:21,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:08:21,664 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:08:21,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:08:21,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1448090520, now seen corresponding path program 3 times [2023-02-18 10:08:21,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:08:21,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129235851] [2023-02-18 10:08:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:08:21,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:08:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:08:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-18 10:08:21,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:08:21,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129235851] [2023-02-18 10:08:21,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129235851] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:08:21,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154019285] [2023-02-18 10:08:21,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 10:08:21,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:08:21,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:08:21,830 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:08:21,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 10:08:21,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 10:08:21,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:08:21,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 10:08:21,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:08:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-18 10:08:21,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:08:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-18 10:08:21,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154019285] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:08:21,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:08:21,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-18 10:08:21,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940829228] [2023-02-18 10:08:21,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:08:21,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 10:08:21,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:08:21,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 10:08:21,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-18 10:08:21,969 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:08:22,087 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2023-02-18 10:08:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 10:08:22,087 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-18 10:08:22,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:08:22,089 INFO L225 Difference]: With dead ends: 85 [2023-02-18 10:08:22,089 INFO L226 Difference]: Without dead ends: 79 [2023-02-18 10:08:22,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-18 10:08:22,089 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:08:22,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 41 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 10:08:22,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-18 10:08:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 33. [2023-02-18 10:08:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-02-18 10:08:22,093 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2023-02-18 10:08:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:08:22,093 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-02-18 10:08:22,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-02-18 10:08:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 10:08:22,094 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:08:22,094 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:08:22,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 10:08:22,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:08:22,295 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:08:22,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:08:22,295 INFO L85 PathProgramCache]: Analyzing trace with hash -798905000, now seen corresponding path program 4 times [2023-02-18 10:08:22,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:08:22,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168791113] [2023-02-18 10:08:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:08:22,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:08:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:08:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-02-18 10:08:22,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:08:22,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168791113] [2023-02-18 10:08:22,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168791113] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:08:22,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451892508] [2023-02-18 10:08:22,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 10:08:22,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:08:22,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:08:22,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:08:22,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 10:08:22,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 10:08:22,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:08:22,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 10:08:22,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:08:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-18 10:08:22,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:08:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-18 10:08:22,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451892508] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:08:22,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:08:22,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 38 [2023-02-18 10:08:22,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44749425] [2023-02-18 10:08:22,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:08:22,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-18 10:08:22,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:08:22,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-18 10:08:22,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 10:08:22,911 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:23,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:08:23,019 INFO L93 Difference]: Finished difference Result 142 states and 171 transitions. [2023-02-18 10:08:23,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 10:08:23,020 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 10:08:23,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:08:23,021 INFO L225 Difference]: With dead ends: 142 [2023-02-18 10:08:23,021 INFO L226 Difference]: Without dead ends: 124 [2023-02-18 10:08:23,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 10:08:23,022 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 171 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:08:23,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 78 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 10:08:23,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-18 10:08:23,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 59. [2023-02-18 10:08:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-02-18 10:08:23,027 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 31 [2023-02-18 10:08:23,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:08:23,028 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-02-18 10:08:23,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:08:23,028 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-02-18 10:08:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 10:08:23,044 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:08:23,045 INFO L195 NwaCegarLoop]: trace histogram [35, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:08:23,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 10:08:23,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:08:23,245 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:08:23,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:08:23,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1918403063, now seen corresponding path program 5 times [2023-02-18 10:08:23,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:08:23,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709872848] [2023-02-18 10:08:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:08:23,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:08:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:08:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2023-02-18 10:08:23,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:08:23,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709872848] [2023-02-18 10:08:23,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709872848] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:08:23,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219727296] [2023-02-18 10:08:23,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 10:08:23,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:08:23,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:08:23,525 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:08:23,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 10:10:33,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-02-18 10:10:33,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:10:33,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 10:10:33,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:10:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-18 10:10:33,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:10:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-18 10:10:34,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219727296] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:10:34,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:10:34,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 38, 38] total 84 [2023-02-18 10:10:34,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161513953] [2023-02-18 10:10:34,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:10:34,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-02-18 10:10:34,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:10:34,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-02-18 10:10:34,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3485, Invalid=3487, Unknown=0, NotChecked=0, Total=6972 [2023-02-18 10:10:34,407 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:10:34,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:10:34,711 INFO L93 Difference]: Finished difference Result 227 states and 282 transitions. [2023-02-18 10:10:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-02-18 10:10:34,712 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-02-18 10:10:34,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:10:34,713 INFO L225 Difference]: With dead ends: 227 [2023-02-18 10:10:34,713 INFO L226 Difference]: Without dead ends: 206 [2023-02-18 10:10:34,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3933 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3485, Invalid=3487, Unknown=0, NotChecked=0, Total=6972 [2023-02-18 10:10:34,715 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 411 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 10:10:34,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 109 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 10:10:34,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-02-18 10:10:34,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 111. [2023-02-18 10:10:34,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:10:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2023-02-18 10:10:34,723 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 57 [2023-02-18 10:10:34,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:10:34,723 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2023-02-18 10:10:34,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:10:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2023-02-18 10:10:34,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-18 10:10:34,725 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:10:34,725 INFO L195 NwaCegarLoop]: trace histogram [81, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:10:34,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 10:10:34,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:10:34,949 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:10:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:10:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash -217898473, now seen corresponding path program 6 times [2023-02-18 10:10:34,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:10:34,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426241050] [2023-02-18 10:10:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:10:34,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:10:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:10:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3511 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-02-18 10:10:35,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:10:35,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426241050] [2023-02-18 10:10:35,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426241050] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:10:35,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41544636] [2023-02-18 10:10:35,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 10:10:35,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:10:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:10:35,570 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:10:35,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 10:14:31,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2023-02-18 10:14:31,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:14:31,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-18 10:14:31,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:14:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3511 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-02-18 10:14:31,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:14:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3511 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-02-18 10:14:31,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41544636] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:14:31,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:14:31,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 43 [2023-02-18 10:14:31,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795983951] [2023-02-18 10:14:31,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:14:31,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 10:14:31,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:14:31,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 10:14:31,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 10:14:31,823 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 43 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:14:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:14:32,065 INFO L93 Difference]: Finished difference Result 334 states and 357 transitions. [2023-02-18 10:14:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-18 10:14:32,066 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2023-02-18 10:14:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:14:32,069 INFO L225 Difference]: With dead ends: 334 [2023-02-18 10:14:32,069 INFO L226 Difference]: Without dead ends: 328 [2023-02-18 10:14:32,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 19 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 10:14:32,070 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 444 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 10:14:32,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 134 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 10:14:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-02-18 10:14:32,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 132. [2023-02-18 10:14:32,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:14:32,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2023-02-18 10:14:32,090 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 109 [2023-02-18 10:14:32,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:14:32,091 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2023-02-18 10:14:32,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:14:32,092 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2023-02-18 10:14:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-18 10:14:32,096 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:14:32,096 INFO L195 NwaCegarLoop]: trace histogram [81, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:14:32,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 10:14:32,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:14:32,297 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:14:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:14:32,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1564633261, now seen corresponding path program 7 times [2023-02-18 10:14:32,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:14:32,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884782080] [2023-02-18 10:14:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:14:32,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:14:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:14:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-02-18 10:14:33,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:14:33,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884782080] [2023-02-18 10:14:33,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884782080] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:14:33,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781191351] [2023-02-18 10:14:33,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 10:14:33,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:14:33,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:14:33,681 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:14:33,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 10:14:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:14:33,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-18 10:14:33,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:14:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2023-02-18 10:14:34,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:14:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2023-02-18 10:14:38,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781191351] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:14:38,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:14:38,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 84, 84] total 197 [2023-02-18 10:14:38,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835651861] [2023-02-18 10:14:38,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:14:38,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2023-02-18 10:14:38,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:14:38,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2023-02-18 10:14:38,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19305, Invalid=19307, Unknown=0, NotChecked=0, Total=38612 [2023-02-18 10:14:38,213 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 197 states, 197 states have (on average 1.1116751269035532) internal successors, (219), 197 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:14:40,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:14:40,475 INFO L93 Difference]: Finished difference Result 565 states and 693 transitions. [2023-02-18 10:14:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2023-02-18 10:14:40,476 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 1.1116751269035532) internal successors, (219), 197 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2023-02-18 10:14:40,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:14:40,477 INFO L225 Difference]: With dead ends: 565 [2023-02-18 10:14:40,478 INFO L226 Difference]: Without dead ends: 517 [2023-02-18 10:14:40,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 96 SyntacticMatches, 10 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22540 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=19305, Invalid=19307, Unknown=0, NotChecked=0, Total=38612 [2023-02-18 10:14:40,483 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1015 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 10:14:40,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 289 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 10:14:40,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2023-02-18 10:14:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 257. [2023-02-18 10:14:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.01171875) internal successors, (259), 256 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:14:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 259 transitions. [2023-02-18 10:14:40,489 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 259 transitions. Word has length 130 [2023-02-18 10:14:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:14:40,490 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 259 transitions. [2023-02-18 10:14:40,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 1.1116751269035532) internal successors, (219), 197 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:14:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 259 transitions. [2023-02-18 10:14:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-02-18 10:14:40,491 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:14:40,492 INFO L195 NwaCegarLoop]: trace histogram [194, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:14:40,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 10:14:40,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-18 10:14:40,698 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:14:40,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:14:40,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1093609288, now seen corresponding path program 8 times [2023-02-18 10:14:40,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:14:40,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086100004] [2023-02-18 10:14:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:14:40,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:14:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:14:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20293 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 18915 trivial. 0 not checked. [2023-02-18 10:14:43,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:14:43,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086100004] [2023-02-18 10:14:43,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086100004] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:14:43,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741497277] [2023-02-18 10:14:43,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 10:14:43,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:14:43,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:14:43,204 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:14:43,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 10:14:43,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 10:14:43,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 10:14:43,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 2283 conjuncts, 196 conjunts are in the unsatisfiable core [2023-02-18 10:14:43,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 10:14:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20293 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2023-02-18 10:14:45,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 10:15:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20293 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2023-02-18 10:15:02,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741497277] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 10:15:02,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 10:15:02,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 197, 197] total 421 [2023-02-18 10:15:02,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266888443] [2023-02-18 10:15:02,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 10:15:02,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 421 states [2023-02-18 10:15:02,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 10:15:02,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 421 interpolants. [2023-02-18 10:15:02,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88409, Invalid=88411, Unknown=0, NotChecked=0, Total=176820 [2023-02-18 10:15:02,162 INFO L87 Difference]: Start difference. First operand 257 states and 259 transitions. Second operand has 421 states, 421 states have (on average 1.0855106888361046) internal successors, (457), 421 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:15:19,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 10:15:19,723 INFO L93 Difference]: Finished difference Result 957 states and 1210 transitions. [2023-02-18 10:15:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 421 states. [2023-02-18 10:15:19,724 INFO L78 Accepts]: Start accepts. Automaton has has 421 states, 421 states have (on average 1.0855106888361046) internal successors, (457), 421 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2023-02-18 10:15:19,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 10:15:19,727 INFO L225 Difference]: With dead ends: 957 [2023-02-18 10:15:19,727 INFO L226 Difference]: Without dead ends: 897 [2023-02-18 10:15:19,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 120 SyntacticMatches, 24 SemanticMatches, 419 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113327 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=88409, Invalid=88411, Unknown=0, NotChecked=0, Total=176820 [2023-02-18 10:15:19,733 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1703 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1703 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 10:15:19,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1703 Valid, 512 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 10:15:19,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-02-18 10:15:19,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 507. [2023-02-18 10:15:19,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.0059288537549407) internal successors, (509), 506 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:15:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 509 transitions. [2023-02-18 10:15:19,752 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 509 transitions. Word has length 255 [2023-02-18 10:15:19,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 10:15:19,752 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 509 transitions. [2023-02-18 10:15:19,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 421 states, 421 states have (on average 1.0855106888361046) internal successors, (457), 421 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 10:15:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 509 transitions. [2023-02-18 10:15:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-02-18 10:15:19,756 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 10:15:19,757 INFO L195 NwaCegarLoop]: trace histogram [418, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 10:15:19,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 10:15:19,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 10:15:19,965 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 10:15:19,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 10:15:19,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2064974600, now seen corresponding path program 9 times [2023-02-18 10:15:19,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 10:15:19,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198941845] [2023-02-18 10:15:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 10:15:19,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 10:15:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 10:15:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 90652 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 87571 trivial. 0 not checked. [2023-02-18 10:15:25,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 10:15:25,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198941845] [2023-02-18 10:15:25,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198941845] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 10:15:25,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150593648] [2023-02-18 10:15:25,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 10:15:25,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 10:15:25,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 10:15:25,784 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 10:15:25,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process